Table 4.
The IVDMD, in vitro gas production kinetics, and rumen fluid fermentation profile of different parts of paper mulberry silage.
| Items 1 | Groups | ||
|---|---|---|---|
| Leaf | Stem | Whole Plant | |
| IVDMD (g/kg DM) | 909.00 ± 22.73 a | 484.31 ± 22.16 c | 683.51 ± 8.6 b |
| pH | 6.94 ± 0.02 | 6.93 ± 0.07 | 6.97 ± 0.05 |
| NH3-N (mg/dL) | 12.08 ± 0.45 | 11.10 ± 0.83 | 11.94 ± 0.30 |
| Acetate (mmol/L) | 53.03 ± 0.59 a | 48.25 ± 1.79 b | 52.99 ± 1.59 a |
| Propionate (mmol/L) | 24.67 ± 1.04 a | 19.09 ± 0.98 b | 20.07 ± 0.87 b |
| Isobutyrate (mmol/L) | 0.72 ± 0.17 b | 1.57 ± 0.08 a | 1.67 ± 0.15 a |
| Butyrate (mmol/L) | 9.76 ± 0.76 | 8.32 ± 0.39 | 9.28 ± 0.52 |
| Isovalerate (mmol/L) | 2.39 ± 0.28 | 2.04 ± 0.15 | 2.44 ± 0.21 |
| Valerate (mmol/L) | 2.05 ± 0.07 a | 1.65 ± 0.01 b | 1.92 ± 0.10 ab |
| Total VFA (mmol/L) | 92.63 ± 2.83 a | 80.92 ± 1.36 b | 88.37 ± 1.89ab |
| GP48 (mL/g) | 90.05 ± 7.74 | 74.24 ± 12.28 | 82.40 ± 8.31 |
| A | 95.65 ± 7.72 a | 75.92 ± 12.53 b | 89.56 ± 8.50 b |
| B | 1.44 ± 0.10 a | 1.28 ± 0.04 b | 1.27 ± 0.05 b |
| C | 3.95 ± 0.33 | 4.00 ± 0.57 | 4.09 ± 0.60 |
| TRmaxG | 1.21 ± 0.31 | 0.78 ± 0.09 | 0.78 ± 0.25 |
| RmaxG | 15.05 ± 2.10 | 12.28 ± 1.95 | 13.38 ± 2.60 |
| TRmaxS | 2.07 ± 0.54 | 1.56 ± 0.02 | 1.60 ± 0.48 |
| RmaxS | 0.20 ± 0.02 | 0.19 ± 0.03 | 0.19 ± 0.03 |
Values with different lowercase superscript letters (a, b, and c) are significantly different (p < 0.05) between different parts. 1 IVDMD: in vitro dry matter digestibility; VFA: volatile fatty acid; GP48: the cumulative gas production at 48 h; A: the asymptotic gas production (mL/g); B: a sharpness parameter determining the shape of the curve; C: the time (h) at which half of A is reached and t is in vitro incubation time; TRmaxS: the time at which maximum rate of substrate degradation is reached (h); RmaxS: the maximum rate of substrate digestion (/h); TRmaxG: the time at which RmaxG is reached (h); RmaxG: the maximum gas production rate (mL/h).